Digital Equipment Digital AlphaStation 200 Series Manual

DigitalAlphaStation200/400Series
TechnicalInformation
Part Number: EK-PCDSA-TI. A01
Digital Equipment Corporation
Maynard, Massachusetts

April 1995
Digital Equipment Corporation makes no representations that the use of its products in the manner described in this
publication will not infringe on existing or future patent rights, nor do the descriptions contained in this publication
imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.
Possession, use, or copying of the software described in this publication is authorized only pursuant to a valid
written license from Digital or an authorized sublicensor.
© Digital Equipment Corporation 1995. All rights reserved.
The postpaid Reader's Comments form at the end of this document requests your critical evaluation to assist in
preparing future documentation.
The following are trademarks of Digital Equipment Corporation: AlphaGeneration, AlphaServer, AlphaStation,
DECchip, the DIGITAL logo, and OpenVMS.
The following are third-party trademarks:
Ethernet is a trademark of Xerox Corporation; IBM PC/AT is a trademark of International Business Machines;
SIMM is a trademark of Molex Corporation; UNIX is a registered trademark in the United States and other
countries licensed exclusively through X/Open Company, Ltd.; Windows NT is a trademark of Microsoft
Corporation; and Windows Sound System is a trademark of Microsoft Corporation.
All other trademarks and registered trademarks are the property of their respective holders.

Contents
Preface
Intended Audience ................................................................................................................. xv
Document Contents................................................................................................................ xv
Associated Documents .......................................................................................................... xvi
Conventions......................................................................................................................... xvii
Abbreviations....................................................................................................................... xvii
1 Digital AlphaStation System Descriptions
Overview ..............................................................................................................................1-1
System Features....................................................................................................................1-1
System Unit.................................................................................................................... 1-2
AlphaStation 200 Series System ..............................................................................1-2
Desktop Enclosure..........................................................................................1-2
Controls, Indicators, and Connectors .............................................................. 1-3
AlphaStation 400 Series System ..............................................................................1-6
Deskside Enclosure ........................................................................................ 1-6
Controls Indicators, and Connectors ............................................................... 1-6
System Architecture............................................................................................................1-11
Features........................................................................................................................ 1-11
CPU .............................................................................................................................1-13
Core Logic ................................................................................................................... 1-14
Cache and Memory Control................................................................................... 1-14
Data Path...................................................................................................................... 1-15
PCI Bridge ................................................................................................................... 1-15
Secondary Cache (Bcache).................................................................................... 1-16
Memory System ........................................................................................................... 1-16
Main Memory........................................................................................................ 1-16
ROM Interface....................................................................................................... 1-17
iii

NVRAM................................................................................................................ 1-17
FlashROM Memory............................................................................................... 1-17
DROM .................................................................................................................. 1-17
Diagnostic LEDs................................................................................................... 1-17
PCI............................................................................................................................... 1-18
SCSI............................................................................................................................. 1-18
Ethernet LAN Controller (DECchip 21040)........................................................... 1-18
ISA Bridge............................................................................................................ 1-19
ISA Bus........................................................................................................................ 1-19
Serial I/O............................................................................................................... 1-19
Keyboard/Mouse................................................................................................... 1-19
TOY Clock............................................................................................................ 1-19
Floppy Disk Controller (FDC)............................................................................... 1-20
Sound Card: Digital AlphaStation 200 Series System................................................... 1-20
2 Configuring Your AlphaStation System
Overview .............................................................................................................................. 2-1
System Configurations.......................................................................................................... 2-1
Memory................................................................................................................................ 2-2
Mass Storage Expansion ....................................................................................................... 2-3
Internal Bay Availability: AlphaStation 200 Series Systems........................................... 2-3
Internal Bay Availability: AlphaStation 400 Series Systems........................................... 2-4
External SCSI Bus Expansion ........................................................................................ 2-6
SCSI Termination.................................................................................................... 2-6
AlphaStation 200 Series System SCSI Termination........................................ 2-7
AlphaStation 400 Series System SCSI Termination........................................ 2-7
SCSI IDs................................................................................................................. 2-7
PCI Expansion ...................................................................................................................... 2-8
PCI IDSEL Assignments................................................................................................ 2-9
Ethernet LAN Controller Chip............................................................................... 2-11
Ethernet Identification SROM...................................................................... 2-12
ISA Expansion.................................................................................................................... 2-12
Jumpers............................................................................................................................... 2-14
AlphaStation 200 Series System................................................................................... 2-14
Motherboard.......................................................................................................... 2-14
Figure 2-4. AlphaStation 200 Series System Motherboard Jumpers ...................... 2-14
Sound Card............................................................................................................ 2-17
AlphaStation 400 Series System................................................................................... 2-18
Motherboard.......................................................................................................... 2-18
CPU Module ......................................................................................................... 2-19
iv

3 Addressing
Overview ..............................................................................................................................3-1
Address Diagram...................................................................................................................3-2
Cacheable Memory Space: 0 0000.0000-0 FFFF.FFFF..........................................................3-3
Noncacheable Memory Space:1 0000.0000-1 FFFF.FFFF.....................................................3-4
First Two GBytes of Noncacheable Space......................................................................3-4
Cache/Memory Controller..............................................................................................3-5
PCI Bridge Registers......................................................................................................3-7
PCI Sparse I/O Space .....................................................................................................3-8
Embedded ISA Device Addresses.......................................................................... 3-12
AlphaStation 200 Series System Sound Card......................................................... 3-14
Configuration Cycles....................................................................................................3-15
PCI Sparse Memory Space.................................................................................................. 3-16
PCI Dense Memory Space................................................................................................... 3-19
I/O Device View of I/O Space............................................................................................. 3-21
4 I/O Programming
Overview ..............................................................................................................................4-1
Accessing Flashbus Devices..................................................................................................4-1
Flashbus Offsets.............................................................................................................4-3
Access Procedure ...........................................................................................................4-3
Keyboard and Mouse Controller............................................................................................ 4-4
TOY......................................................................................................................................4-5
Super I/O Chip......................................................................................................................4-6
Disabling Interrupts...............................................................................................................4-6
5 DMA
Overview ..............................................................................................................................5-1
ISA DMA Channels ..............................................................................................................5-1
6 Hardware Interrupts
Overview ..............................................................................................................................6-1
Interrupts............................................................................................................................... 6-1
IRQ0: CPU Bus and Parity Errors................................................................................... 6-2
IRQ2: Device Interrupts .................................................................................................6-3
IRQ3: NMI (Nonmaskable Interrupt).............................................................................. 6-3
IRQ4: Interval Timer Interrupt ....................................................................................... 6-3
IRQ5: HALTREQ ..........................................................................................................6-3
Interrupt Inputs...............................................................................................................6-4
v

PCI Interrupts................................................................................................................. 6-5
7 System Power-Up and Initialization
Overview .............................................................................................................................. 7-1
Power-Up Sequence.............................................................................................................. 7-1
Power Supply and Input Power Requirements....................................................................... 7-2
AlphaStation 200 Series System..................................................................................... 7-2
AlphaStation 400 Series System..................................................................................... 7-2
8 AlphaStation Firmware
Overview .............................................................................................................................. 8-1
Firmware Components.......................................................................................................... 8-1
Initialization.......................................................................................................................... 8-2
SROM Features..................................................................................................................... 8-3
Loading the SROM Code............................................................................................... 8-3
SROM LED Codes......................................................................................................... 8-3
SROM Beep Codes ........................................................................................................ 8-5
Leaving the SROM Code ............................................................................................... 8-5
DROM Features.................................................................................................................... 8-5
Loading the DROM code ............................................................................................... 8-6
DROM LED Codes........................................................................................................ 8-6
DROM Beep Codes........................................................................................................ 8-7
Leaving the DROM Code............................................................................................... 8-7
ARC Console Features.......................................................................................................... 8-9
ARC Console LED Codes.............................................................................................. 8-9
SRM Console Features........................................................................................................ 8-10
SRM Console LED Codes............................................................................................ 8-10
ISA Configuration Utility............................................................................................. 8-12
Command Format.................................................................................................. 8-12
Adding ISA Options to OpenVMS and Digital UNIX Systems .............................. 8-14
ISACFG Command Examples............................................................................... 8-14
SRM Scripts................................................................................................................. 8-15
9 Fault Management
Overview .............................................................................................................................. 9-1
Control Signal Codes ............................................................................................................ 9-2
PCI Cycle Codes............................................................................................................ 9-2
Cycle Acknowledgment ................................................................................................. 9-3
Cycle Request................................................................................................................ 9-3
vi

IO Commands................................................................................................................9-4
Summary of Errors................................................................................................................9-4
Machine Check ID .........................................................................................................9-4
Machine Check Logout Frame ..............................................................................................9-6
Error Registers......................................................................................................................9-9
PALcode and Operating System Responsibilities ..................................................................9-9
Error Format ....................................................................................................................... 9-10
SCB 660 Fatal Machine Checks.......................................................................................... 9-11
Machine Check Code 0x201, Retry Timeout Error....................................................... 9-11
Machine Check Code 0x202, DMA Data Parity Error .................................................. 9-11
Machine Check Code 0x203, I/O Parity Error ..............................................................9-12
Machine Check Code 0x204, Target Abort................................................................... 9-12
Machine Check Code 0x205, No Device ...................................................................... 9-14
Machine Check Code 0x206, Correctable Memory Error.............................................. 9-14
Machine Check Code 0x207, Uncorrectable Memory Error.......................................... 9-15
Machine Check Code 0x208, Invalid Page Table Lookup............................................. 9-15
Machine Check Code 0x209, Memory Error................................................................. 9-16
Machine Check Code 0x20A, Bcache Tag Address Parity Error................................... 9-17
Machine Check Code 0x20B, Bcache Tag Control Parity Error.................................... 9-17
Machine Check Code 0x20C, Nonexistent Memory Error ............................................ 9-18
Machine Check Code 0x20D, I/O Bus Error................................................................. 9-18
Machine Check Code 0x80, Bcache Tag Parity Error...................................................9-19
Machine Check Code 0x82, Bcache Tag Control Parity Error ...................................... 9-20
SCB 670 PROCESSOR FATAL MACHINE CHECKS....................................................... 9-21
Machine Check Code 0x84, Hard Error........................................................................ 9-21
Machine Check Code 0x86, Correctable ECC .............................................................. 9-21
Machine Check Code 0x88, Noncorrectable ECC.........................................................9-22
Machine Check Code 0x8A, Unknown Error................................................................9-22
Machine Check Code 0x8C, Soft Error......................................................................... 9-23
Machine Check Code 0x8E, Bugcheck.........................................................................9-23
Machine Check Code 0x90, OS Bugcheck.................................................................... 9-24
Machine Check Code 0x92, Primary Cache Data Fill Error (Dcache)........................... 9-24
Machine Check Code 0x94, Primary Cache Data Fill Error (Icache) ............................ 9-25
Primary Cache Fill ECC Error............................................................................... 9-25
ADDITIONAL ERRORS.............................................................................................9-26
Bcache Multiple Error...........................................................................................9-26
Lost Error.............................................................................................................. 9-26
Primary Cache Multiple Error................................................................................ 9-27
10 Connector and Cable Information
Overview ............................................................................................................................10-1
vii

AlphaStation 200 Series System Internal Connectors .......................................................... 10-1
Motherboard................................................................................................................. 10-1
Serial Diagnostic Port............................................................................................ 10-1
Speaker Connector ................................................................................................ 10-2
Floppy Disk Controller.......................................................................................... 10-3
Sound Card Connector........................................................................................... 10-3
Front-Panel Lights and Switches Connector .......................................................... 10-4
Internal SCSI Bus Connector J15........................................................................... 10-5
Power Connectors.................................................................................................. 10-6
Fan Connector....................................................................................................... 10-6
Riser Card.................................................................................................................... 10-6
Sound Card .................................................................................................................. 10-7
AlphaStation 400 Series System Connectors and Cables ..................................................... 10-7
Motherboard................................................................................................................. 10-7
Floppy................................................................................................................... 10-8
Front-Panel Lights and Switches Connector .......................................................... 10-8
CPU Module: Serial Diagnostic Port............................................................................ 10-9
PCI Slots............................................................................................................................10-10
ISA Expansion Slots ..........................................................................................................10-12
External Connectors...........................................................................................................10-14
Parallel Port ................................................................................................................10-19
Serial Line Units.........................................................................................................10-20
COM1/2 Pinouts...................................................................................................10-20
SCSI............................................................................................................................10-20
Connector Pinouts ................................................................................................10-21
Keyboard/Mouse.........................................................................................................10-22
Internal Cables...................................................................................................................10-23
Sound Card .................................................................................................................10-23
11 Registers
Overview ............................................................................................................................ 11-1
CPU Registers..................................................................................................................... 11-2
Translation Buffer Tag (TB_TAG) Register................................................................. 11-2
Instruction Translation Buffer Page Table Entry (ITB_PTE) Register .......................... 11-2
Instruction Cache Control and Status Register (ICCSR) ............................................... 11-2
Instruction Translation Buffer Page Table Entry Temp (ITB_PTE_TEMP) Register.... 11-3
Exceptions Address (EXC_ADDR) Register ................................................................ 11-3
Clear Serial Line Interrupt Register (SL_CLR) ............................................................ 11-3
Serial Line Receive (SL_RCV) Register ...................................................................... 11-3
Instruction Translation Buffer ZAP (ITBZAP) Register ............................................... 11-3
Instruction Translation Buffer ASM (ITBASM) Register ............................................. 11-3
viii

Instruction Translation Buffer IS (ITBIS) Register ....................................................... 11-3
Processor Status (PS) Register......................................................................................11-4
Exception Summary (EXC_SUM) Register..................................................................11-4
PAL Base Address (PAL_BASE) Register ................................................................... 11-4
Hardware Interrupt Request Register (HIRR) ............................................................... 11-4
Software Interrupt Request Register (SIRR) ................................................................. 11-5
Asynchronous Trap Request Register (ASTRR) ...........................................................11-5
Hardware Interrupt Enable Register (HIER).................................................................11-5
Software Interrupt Enable Register (SIER)................................................................... 11-6
AST Interrupt Enable Register (ASTER)...................................................................... 11-6
Serial Line Transmit Register (SL_XMIT) ................................................................... 11-6
Translation Buffer Control (TB_CTL) Register............................................................11-6
Data Translation Buffer Page Table Entry Register (DTB_PTE) .................................. 11-7
Data Translation Buffer Page Table Entry Temporary (DTB_PTE_TEMP) Register.... 11-7
Memory Management Control and Status Register (MM_CSR).................................... 11-7
Virtual Address (VA) Register...................................................................................... 11-7
Data Translation Buffer ZAP (DTBZAP) Register........................................................ 11-7
Data Translation Buffer ASM (DTBASM) Register...................................................... 11-7
Data Translation Buffer Invalidate Single (DTBIS) Register ........................................ 11-7
Flush Instruction Cache (FLUSH_IC) Register............................................................. 11-7
Flush Instruction Cache ASM (FLUSH_IC_ASM) Register.......................................... 11-8
Abox Control Register.................................................................................................. 11-8
Alternate Processor Mode (ALT_MODE) Register....................................................... 11-8
Cycle Counter (CC) Register........................................................................................ 11-8
Cycle Counter Control (CC_CTL) Register.................................................................. 11-9
Bus Interface Unit Control (BIU_CTL) Register .......................................................... 11-9
Data Cache Status (DC_STAT) Register ...................................................................... 11-9
Cache Status (C_STAT) Register .................................................................................11-9
Bus Interface Unit Status (BIU_STAT) Register......................................................... 11-10
Bus Interface Unit Address (BIU_ADDR) Register .................................................... 11-10
Fill Address (FILL_ADDR) Register.......................................................................... 11-10
Fill Syndrome (FILL_SYNDROME) Register............................................................ 11-10
Backup Cache Tag (BC_TAG) Register..................................................................... 11-11
Cache and Memory Control CSRs..................................................................................... 11-11
General Control Register............................................................................................ 11-12
Error and Diagnostic Status Register .......................................................................... 11-12
Tag Enable Register................................................................................................... 11-13
Error Low Address Register ....................................................................................... 11-13
Error High Address Register....................................................................................... 11-13
LDxL Low Address Register...................................................................................... 11-13
LDxL High Address Register .....................................................................................11-14
Bankset 0-8 Base Address Registers........................................................................... 11-14
Bankset 0-7 Configuration Registers .......................................................................... 11-14
ix

PCI Bus Bridge CSRs ........................................................................................................11-15
Diagnostic Control and Status Register .......................................................................11-15
PCI Error Address Register.........................................................................................11-15
Sysbus Error Address Register ....................................................................................11-15
Translated Base Registers............................................................................................11-16
PCI Base Registers......................................................................................................11-16
PCI Mask Registers.....................................................................................................11-16
Host Address Extension Register 0..............................................................................11-16
Host Address Extension Register 1..............................................................................11-17
Host Address Extension Register 2..............................................................................11-17
Master Latency Timer Register...................................................................................11-17
TLB Tag Registers 0-7................................................................................................11-17
TLB Data Registers 0-7...............................................................................................11-18
I/O Registers......................................................................................................................11-18
PCI Bus Device Registers............................................................................................11-18
Ethernet Controller Registers................................................................................11-18
SCSI Controller Registers.....................................................................................11-19
ISA Bus Device Registers ...........................................................................................11-20
Keyboard and Mouse Registers ............................................................................11-20
TOY Clock Registers ...........................................................................................11-20
Serial Port Registers.............................................................................................11-20
Parallel Port Registers ..........................................................................................11-20
Floppy Disk Controller Registers..........................................................................11-20
Sound Card Registers ...........................................................................................11-21
Audio Command Register ...........................................................................11-22
Audio ID and Status Register ......................................................................11-22
Index
Figures
1-1 AlphaStation 200 Series Control and Indicators......................................................... 1-3
1-2 AlphaStation 200 Series Rear Connectors.................................................................. 1-5
1-3 AlphaStation 400 Series Control and Indicators......................................................... 1-7
1-4 AlphaStation 400 Series Rear Connectors.................................................................. 1-9
1-5 AlphaStation 200 Series System Architecture.......................................................... 1-12
1-6 AlphaStation 400 Series System Architecture.......................................................... 1-13
2-1 Internal Bays - AlphaStation 200 Series System ........................................................ 2-4
2-2 Internal Bays - AlphaStation 400 Series Systems....................................................... 2-5
2-3 PCI Configuration Header Region ........................................................................... 2-11
2-4 AlphaStation 200 Series System Motherboard Jumpers............................................ 2-14
x

2-5 AlphaStation 200 Series Sound Card Jumpers.......................................................... 2-17
2-6 AlphaStation 400 Series Motherboard Jumpers........................................................ 2-18
2-7 AlphaStation 400 Series PB50C-BA CPU Module Jumpers ..................................... 2-20
3-1 Physical Address Space..............................................................................................3-2
3-2 Cacheable Memory Space..........................................................................................3-3
3-3 Noncacheable Address Space.....................................................................................3-4
3-4 PCI Sparse I/O Space Translation (Lower 256 KByte)............................................... 3-9
3-5 PCI Sparse I/O Address Translation (Remaining 16 MBytes).....................................3-9
3-6 PCI Sparse Address Space ....................................................................................... 3-11
3-7 PCI Sparse Memory Space....................................................................................... 3-16
3-8 PCI Memory Space Address Translation (Lower 16 MBytes) .................................. 3-17
3-9 PCI Memory Space Address Translation (Remaining 112 MBytes)..........................3-18
3-10 PCI Dense Memory Space ....................................................................................... 3-19
3-11 Address Space from the I/O Perspective................................................................... 3-21
4-1 Flashbus Index Register.............................................................................................4-2
4-2 Flashbus Data Register...............................................................................................4-2
5-1 DMA Channel Assignments.......................................................................................5-2
6-1 Interrupt System Block Diagram................................................................................6-2
7-1 Power Supply Timing................................................................................................7-2
8-1 AlphaStation Interface Relationships.........................................................................8-2
8-2 Possible DROM Code Actions...................................................................................8-8
10-1 AlphaStation 200 Series System Rear Connectors................................................. 10-14
10-2 AlphaStation 400 Series System Rear Connectors................................................. 10-16
Tables
1-1 Distinctive Features of the Digital AlphaStation 200 and 400 Series Systems ............1-2
1-2 AlphaStation Series Front Controls and Indicators.....................................................1-4
1-3 AlphaStation 200 Series Rear Connectors..................................................................1-5
1-4 AlphaStation 400 Series Controls and Indicators........................................................ 1-8
1-5 AlphaStation 400 Series Rear Connectors................................................................1-10
2-1 Typical Digital AlphaStation System Configurations.................................................2-2
2-2 Supported SIMMs for the Digital AlphaStation.......................................................... 2-3
2-3 Description of the AlphaStation 200 Series Internal Bays ..........................................2-4
2-4 Description of the AlphaStation 400 Series System Internal Bays.............................. 2-6
2-5 AlphaStation 200 Series System SCSI ID Assignments..............................................2-8
2-6 AlphaStation PCI Expansion Tasks............................................................................ 2-9
2-7 AlphaStation 200 Series System: PCI AD <n> to IDSEL# Assignments ..................2-10
2-8 Procedure for Adding ISA Options........................................................................... 2-13
2-9 AlphaStation 200 Series Motherboard Jumper Locations ......................................... 2-15
2-10 AlphaStation 200 Series System Sound Card Jumper Descriptions........................... 2-17
2-11 AlphaStation 400 Series Motherboard Jumpers........................................................ 2-19
xi

2-12 AlphaStation 400 Series PB50C-BA CPU Module Jumper Descriptions.................. 2-21
3-1 Noncacheable Memory: The First Two GByte........................................................... 3-4
3-2 Cache Memory Controller Registers.......................................................................... 3-5
3-3 PCI Bridge Register Addresses.................................................................................. 3-7
3-4 PCI Sparse I/O Space Byte Selection....................................................................... 3-10
3-5 Embedded ISA Device Addresses............................................................................ 3-12
3-6 AlphaStation 200 Series System Sound Card I/O Addresses .................................... 3-14
3-7 PCI Configuration Cycle Byte Selection.................................................................. 3-15
3-8 PCI Sparse Memory Space Byte Selection............................................................... 3-17
4-1 Flashbus Index Register Bit Descriptions................................................................... 4-2
4-2 Flashbus Data Register Bit Descriptions.................................................................... 4-2
4-3 Flashbus Device Offset Addresses ............................................................................. 4-3
6-1 CPU Interrupt Inputs.................................................................................................. 6-2
6-2 AlphaStation Interrupt Assignments........................................................................... 6-4
6-3 PCI Interrupt Assignments......................................................................................... 6-5
7-1 AlphaStation Series System AC Input Characteristics................................................ 7-2
7-2 AlphaStation 400 Series System AC Input Characteristics......................................... 7-3
8-1 AlphaStation Series System SROM Code Actions ..................................................... 8-4
8-2 AlphaStation SROM Beep Codes............................................................................... 8-5
8-3 AlphaStation DROM POST Actions and LED Codes................................................. 8-6
8-4 AlphaStation DROM Beep Codes.............................................................................. 8-7
8-5 ARC Console LED Codes.......................................................................................... 8-9
8-6 SRM Console LED Codes ....................................................................................... 8-10
8-7 SRM ISACFG Command Options ........................................................................... 8-12
8-8 Adding Options to OpenVMS or Digital UNIX Systems.......................................... 8-14
9-1 PCI Cycle Codes........................................................................................................ 9-2
9-2 PCI cAck Cycle Codes .............................................................................................. 9-3
9-3 PCI cReq Cycle Codes............................................................................................... 9-3
9-4 PCI IO Commands..................................................................................................... 9-4
9-5 Machine Check ID Codes.......................................................................................... 9-5
9-6 Machine Check Logout Frame.................................................................................. 9-6
9-7 Error Registers........................................................................................................... 9-9
9-8 Error Format............................................................................................................ 9-10
9-9 Error: Retry Timeout............................................................................................... 9-11
9-10 Error: DMA Data Parity Error ................................................................................. 9-11
9-11 Error: I/O Parity....................................................................................................... 9-12
9-12 Target Abort............................................................................................................ 9-12
9-13 No Device ............................................................................................................... 9-14
9-14 Error: Correctable Memory...................................................................................... 9-14
9-15 Error: Uncorrectable Memory.................................................................................. 9-15
9-16 Invalid Page Table Lookup...................................................................................... 9-15
9-17 Memory Error.......................................................................................................... 9-16
9-18 Bcache Tag Address Parity Error............................................................................. 9-17
xii

9-19 Bcache Tag Control Parity Error.............................................................................. 9-17
9-20 Nonexistent Memory Error ......................................................................................9-18
9-21 I/O Bus Error........................................................................................................... 9-18
9-22 Bcache Tag Parity Error........................................................................................... 9-19
9-23 Bcache Tag Control Parity Error.............................................................................. 9-20
9-24 Hard Error ............................................................................................................... 9-21
9-25 Correctable ECC...................................................................................................... 9-21
9-26 Noncorrectable ECC................................................................................................ 9-22
9-27 Unknown Error........................................................................................................ 9-22
9-28 Soft Error.................................................................................................................9-23
9-29 Bugcheck................................................................................................................. 9-23
9-30 OS Bugcheck...........................................................................................................9-24
9-31 Primary Cache Data Fill Error (Dcache) .................................................................. 9-24
9-32 Primary Cache Data Fill Error (Icache).................................................................... 9-25
9-33 Primary Cache Fill ECC Error ................................................................................. 9-25
9-34 Bcache Multiple Error .............................................................................................9-26
9-35 Lost Error ................................................................................................................9-26
9-36 Primary Cache Multiple Error.................................................................................. 9-27
10-1 Serial Diagnostic Port Connector Pinout.................................................................. 10-2
10-2 AlphaStation 200 Series System Audio Connector Pinout........................................ 10-2
10-3 Floppy Device Controller Connector Pinouts........................................................... 10-3
10-4 AlphaStation 200 Series System Front-Panel Connectors......................................... 10-4
10-5 Internal SCSI Bus Connector ................................................................................... 10-5
10-6 AlphaStation 200 Series System Motherboard Power Connectors ............................ 10-6
10-7 Media Adapter Unit AUI Pinouts............................................................................. 10-7
10-8 AlphaStation 200 Series System Sound Card Connectors......................................... 10-7
10-9 Floppy Device Controller Connector Pinouts........................................................... 10-8
10-10 AlphaStation 400 Series System Front-Panel Connector Pinouts (J31) ..................... 10-9
10-11 Serial Diagnostic Port Connector Pinout.................................................................. 10-9
10-12 PCI Slot Connector Pinouts.................................................................................... 10-10
10-13 ISA Slot Connector Pinouts ................................................................................... 10-12
10-14 AlphaStation 200 Series System Rear Connectors.................................................. 10-14
10-15 AlphaStation 400 Series System Rear Connectors.................................................. 10-17
10-16 AlphaStation 400 Series System External Connectors............................................ 10-18
10-17 Parallel Port Connector Pinout............................................................................... 10-19
10-18 COM1 and COM 2 Connector Pinouts................................................................... 10-20
10-19 SCSI Connector Pinouts......................................................................................... 10-21
10-20 Keyboard Connector Pinouts.................................................................................. 10-22
10-21 Mouse Connector Pinouts ...................................................................................... 10-22
10-22 AlphaStation 200 Series System Internal Cables.................................................... 10-23
10-23 AlphaStation 200 Series System Sound Card Connectors....................................... 10-23
10-24 AlphaStation 400 Series System Internal Cables.................................................... 10-24
11-1 SCSI Chip Register Map........................................................................................ 11-19
xiii

11-2 ISA Device Addresses ............................................................................................11-20
11-3 Audio Register Offsets............................................................................................11-21
11-4 Audio IRQ Selection...............................................................................................11-22
11-5 AlphaStation 200 Series system Audio DMA Channel Selection ............................11-22
xiv

Preface
Intended Audience
This information is intended for VARs (value-added resellers), ISVs, and other system
users or service providers who are configuring their own systems or adding features to
existing AlphaStation 200/400 Series systems.
Document Contents
This information covers the following general topics (see the Table of Contents for a
detailed listing of the material mentioned here):
•Distinctive system features of the Digital AlphaStation 200 Series and 400 Series
systems
•Steps in system configuration
•Addressing
•I/O programming
•Direct memory access (DMA)
•Hardware exceptions and interrupts
•System power-up and initialization
•AlphaStation firmware
•Errors and machine checks
•Connector and cable information
•Console commands
•Registers
xv

Preface
Associated Documents
For additional information on the Digital AlphaStation 200/400 Series systems, refer to the
following information sources:
•Digital AlphaStation 400 Series User Information (EK-PCDSA-UI)
•Digital AlphaStation 400 Series Installation Information (EK-PCDSA-II)
•Digital AlphaStation 200 Series User Information (EK-PCDTA-UI)
•Digital AlphaStation 200 Series Installation Information (EK-PCDTA-II)
Refer to the following additional sources for technical information:
•System I/O (SIO) 82378IB chip, Intel
•PC87332 (Super I/O III) chip, National Semiconductor
•Alpha Architecture Handbook (EC-H1689-10), Digital Equipment Corporation
•DECchip 21064 and DECchip 21064A Microprocessor Hardware Reference Manual,
order number EC-Q9ZUA-TE, Digital Equipment Corporation
•DECchip 2107/21072 Core Chip Sets Data Sheet, order number EC-N0648-72,
Digital Equipment Corporation
•DECchip 21040 Ethernet LAN Controller for PCI Hardware Reference Manual (EC-
N0752-72), Digital Equipment Corporation
•53C810 SCSI I/O Processor Data Manual, NCR
•53C720 SCSI I/O Processor Programmer's Guide, NCR
•BQ4285 Time-of-Year/NVR chip (TOY), Brooktree
•PCI Local Bus Specification, Revision 2.0, PCI Special Interest Grove, Order Number
281446-001
•ISA Bus Specification, IEEE Standards Office
•8242 Keyboard Controller Specification, Intel, PHOENIX Technologies, Ltd.
For information on the error logger within operating systems, write to Intel Corporation,
Literature Sales, P.O. Box 7641, Mt. Prospect, Il 60056-7641. Request the following item:
82420/82430 PCIset ISA and EISA Bridges, Order Number 290483-001.
xvi

Preface
Conventions
This document uses the following conventions:
Convention Example Description
[Enter] Square brackets around text represent a key on the
keyboard.
c:\windows Monospaced text indicates file names, path names,
addresses, directories, or screen text. Each operating
system has its own specific syntax.
bold text Bold text is used occasionally to set off material.
italicized text Italicized text is used for commands that you enter,
buttons that you press, and so forth. Italic type is used
occasionally for emphasis as well.
Addresses 1 A000 0020
Addresses are formatted with spaces (for example, 1
A000 0020h ) rather than with commas.
Abbreviations
This information uses the following, commonly used abbreviations:
Abbreviation Meaning
ASIC application-specific integrated circuit
KByte kilobyte
MByte megabyte
AUI adapter or attachment unit interface,
thickwire Ethernet connection
CAS column address strobe
CPU central processing unit
DRAM dynamic RAM
D-stream data stream
ECC error correction code
EIA Electronics Industry Association
EID Ethernet identification
FDC floppy disk controller
I/O input/output
xvii

Preface
(continued)
ISA industry-standard architecture
I-stream instruction stream
kbits 1024 bits
Kbytes 1000 bytes for storage; 1024 bytes for
memory
kHz kiloHertz, 1000 cycles per second
MAU media adapter unit
Mbits 1,048,576 bits
MBytes 1,000,000 bytes for storage; 1,048,576
bytes for memory
MHz megaHertz, 1,000,000 cycles per
second
NVRAM nonvolatile RAM
PCI peripheral component interconnect
PLL phase-locked loop
RAM random access memory
RAS row address strobe
RISC reduced instruction set computer
ROM read-only memory
SCSI small computer system interconnect
SIMM single in-line memory module
SIO System I/O chip, Intel 87378IB
PCI-ISA bridge chip or super I/O chip
(parallel port, SLU...) NCR 97332
SRAM static RAM
TOY time-of-year clock chip
VCO voltage-controlled oscillator
ZIF zero insertion force
xviii

1
Digital AlphaStation System
Descriptions
Overview
Digital AlphaStation 200 Series and 400 Series systems are state-of-the-art workstations
that incorporate some of the fastest microprocessors available on the market today. This
chapter covers the following general topics:
•System features
•System architecture
System Features
The Digital AlphaStation 200 Series and 400 Series systems share the following
characteristics:
•DECchip 21064 or 21064A Alpha architecture CPU
•DECchip 21071-AA (core logic chipset) consisting of:
— Cache/memory controller (one 21071-CA chip)
— PCI interface (one 21071-DA chip)
— Data path (two 21071-BA chips)
•512 Kbytes of on-board secondary cache (15 ns SRAM)
•From 8 to 384 MBytes of RAM (70 ns DRAM), in three pairs of 128-MByte SIMM
sockets
•One MByte of erasable/rewriteable nonvolatile memory (flashROM)
•8 Kbytes of NVRAM
•Keyboard and mouse ports
•Two serial ports
1-1

AlphaStation System Descriptions
•Bi-directional enhanced parallel port
•TOY clock
•Fast SCSI-2 controller for internal and external devices
•FDC for floppies and tapes
•PCI and ISA expansion slots
Table 1-1 outlines several distinctions between the AlphaStation 200 and 400 Series
systems.
Table 1-1. Distinctive Features of the Digital AlphaStation 200 and
400 Series Systems
Feature AlphaStation 200
Series System AlphaStation 400 Series System
Enclosure Slimline desktop Mini-tower deskside
PCI-only slots 1 2
ISA-only slots 1
(half-height options only) 3
PCI/ISA combination slots 1* 1
Drive bays:
•3.5-inch expansion
•5.25-inch expansion 3 (one nonaccessible)
12 (one nonaccessible) 3
Ethernet LAN controller
(embedded) Yes (on riser with a socketed EID ROM) No
Logic to support dynamic
power management Yes No
Dedicated custom slot for
16-bit stereo audio Yes No
* Some versions of the AlphaStation 200 Series systems have two PCI/ISA slots.
System Unit
AlphaStation 200 Series System
Desktop Enclosure
The Digital AlphaStation 200 Series system's corporate slimline desktop low-profile
enclosure houses the motherboard, I/O riser card, power supply, audio, and Ethernet
options and internal peripherals.
1-2